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arXiv 0804.2553astro-ph
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通过依巴谷原始数据的新缩减,到附近大质量恒星的精确距离

Accurate distances to nearby massive stars with the new reduction of the Hipparcos raw data

J. Maíz Apellániz, E. J. Alfaro, A. Sota

摘要:

我们使用新的依巴谷数据(van Leeuwen 2007)的减少和自洽的距离测定技术的Lutz-Kelker有限的样本,以获得在太阳附近的大质量恒星的距离。最近的大质量恒星的距离不确定性相对于旧的依巴谷约化得到的结果已经大大降低。在两种情况下(gamma 2 Vel和θ 2 Ori A),我们已经能够验证新的值与最近的替代方法的测定结果吻合良好。我们还得到了新的值的垂直位移的太阳相对于银河平面和薄盘的规模高度从我们周围的大质量恒星的空间分布。

英文摘要:

We use the new reduction of the Hipparcos data (van Leeuwen 2007) and a self-consistent distance determination technique for Lutz-Kelker limited samples to obtain distances to the massive stars in the solar vicinity. The distance uncertainties for the nearest massive stars have been substantially reduced with respect to those derived from the old Hipparcos reduction. In two cases (gamma2 Vel and theta2 Ori A) we have been able to verify that the new values are in good agreement with recent determinations with alternative methods. We also derive new values for the vertical displacement of the Sun with respect to the Galactic Plane and for the scale height of the thin disk from the spatial distribution of massive stars around us.

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